【 Weak current College 】 led display design 】

1. Panel size design in the design screen body size, there are three important factors:
(1) display content requirements;
(2) the venue space conditions;
(3) display unit template dimensions (indoor screen) or pixel size (outdoor screen).
2. power consumption and power requirements
Display of average power consumption and power into maximum power. Average power consumption of electricity, also known as the work is usually the actual power consumption. Maximum power consumption is a startup or full bright, extreme situations of power consumption, maximum power is AC power supply (wire diameter, switch, etc.) must be considered. Average power consumption in General to the maximum power consumption of 1/3.
Display a large precision electronic devices use in order to secure and functioning, its AC220V power input or connected computer AC220V power input must be grounded.
Note: your computer's power supply AC220V has entered Earth-side and is connected to the computer chassis.
3. outdoor screen should consider the issue of
The main problems of outdoor screen as follows:
(1) display installed outdoors, Sun and rain, the wind blows dust cover and work conditions. Electronic device get wet or damp cause a short circuit or fire, throw fault even fire, damage caused;
(2) display is likely to be caused by lightning in strong electric magnetic attacks;
(3) the ambient temperature changes. Display screen work itself will produce a certain amount of heat, if the ambient temperature is too high and the heat and harmful, IC may not be functioning properly, or even burned, so that the display system is not functioning properly;
(4) audience wide, sight distance requirements far, wide field of vision requirements; ambient light changes, in particular may be exposed to direct sunlight.
Particular requirements for the above, the outdoor screen must be:
(1) the screen body and the screen body and architecture in the combination must strictly waterproof leak; the screen body should have a good drainage measures once the seeper;
(2) in the display and lightning building installation. Display main and shell keep good grounding, grounding resistance less than 3 ohms, lightning-induced current timely relief;
(3) installation of ventilation and cooling, so that the screen body internal temperature is-10 ¡æ-40 ¡æ. The screen above installed behind the exhaust heat of axial fan;
(4) selection of operating temperature from-40 ℃ ~ 80 ℃ of industrial-grade integrated circuit chip, prevent winter temperature is too low to display cannot be started. ；
(5) in order to guarantee that the ambient light strong case distance Visual, you must choose the ultra-high brightness led;
(6) show the media choose the new wide angle, angle of broad, color pure, consistent coordination between the life of more than 10 000 hours. Displays the media outside of the package is currently the most popular bands cover along the square tube, silicone seal, no metal Assembly; Westley square exquisite, strong and durable, with sunlight, dustproof, waterproof, resistant to high temperature and control circuit characteristics of the "five anti".
Frequently asked questions
1. consider user sites can allow the screen area by factors which»
(1) effective sight distance and the relationship between the actual venue size;
(2) the pixel dimensions and resolution;
(3) units of the base area estimation;
(4) the screen body machinery installation and maintenance space;
(5) the screen body angle on distance.
2. users need for playback?
(1) text display: depending on their text size and resolution requirements;
(2) ordinary video display: 320 x 240 dot matrix;;
(3) digital standard DVD display: 640 × 480 pixels;;
(4) full computer video: ≥ 800 × 600 dot matrix;;
3. environment brightness for the screen body which brightness?
General brightness requirements are as follows:
(1) Interior: > 800CD/M2
(2) half indoor: > 2000CD/M2
(3) outdoor (sitting in the North): > 4000CD/M2
(4) outdoor (faces South): > 8000CD/M2
4. red-green-blue composition in white is what kind of brightness requirements?
Red, green and blue in white colors, contributions are not the same. The fundamental reason for this is because the human eye, as the net
Film for different wavelengths of light feel different. After a large number of experimental tests were following approximately proportional for reference
Examination of the design:
Simple red-green-blue brightness ratio: 3: 6: 1
Precision red-green-blue brightness ratio: 3.0 5.9: 1.1
5. why upscale full color to use pure green tube?
In the actual production of led display, select high luminous efficiency and get the color rich colorful Tri-phosphor
LED lamp, so that in the chromaticity diagram of color in the triangle area and as far as possible; near tongue-shaped × spectral color curve, to meet the rich
Color and brightness of the issue of adequate and tongue-shaped curve leading to 515nm wavelength, so the selection of high-grade led display
Wavelength near purification 515nm green light LED tube, for example choosing 520nm, 525nm or 530nm wavelength of light
LED lamp.
6. in clear brightness and point density requirements, how computer single tube brightness?
Calculated as follows: (with two red, a green and a blue as an example)
Red LED lamp brightness: luminance (CD)/M2/M2 × ÷; numbers; 0.3 ÷; 2
Green LED lamp brightness: luminance (CD)/M2/M2 × ÷; numbers; 0.6
Blue led brightness: luminance (CD)/M2/M2 × ÷; numbers; 0.1
For example: 2500 point density per square meter, 2R1G1B requests per m² brightness-5000CD/M2, then:
Red LED lamp brightness: 2500 × ÷ 5000;; 0.3 ÷; 2 = 0.3
Green LED lamp brightness: 2500 × ÷ 5000;; 0.6 ÷; 2 = 1.2
Blue led brightness: 2500 × ÷ 5000;; 0.1 = 0.2
The brightness of each pixel is: 0.3 ×; 2 + 1.2 + 0.2 = 2.0CDbr>7. Why choose DVI display interface standard?
(1) DVI display card interface is compatible with your computer's display interfaces according to international standards;
(2) without opening the chassis, to facilitate the installation;
(3) memory, dynamic picture display ability;
(4) hardware compatibility ability;
(5) support all operating systems and application software, display flexibility;
(6) mass production, low cost, easy maintenance.
8. display screen can use notebook control, why?
Cannot. Laptop video card is built-in, and there is no way to implement and control system, there is a current BoE notebook now with DVI interface, you can implement notebook control.
9. full color screen with Nichia tube and use homemade pipe subject to what is the difference between prices?
(1) post-production: Nichia Corporation independent production of Wick, homemade pipe general use of United States or post-production of Taiwan company;
(2) packaging: Nichia Corporation independent packaging, domestic production factories, domestic tube packaging manufacturers more;
(3) consistency: Nichia tube rolled up from the same batch of wavelength, consistency, consistency of homemade pipe relatively poor;
(4) life: Nichia tube relatively long service life, the more serious homemade pipe attenuation;
10. indoor fully colorful display module and SMD led full colour display what's the difference?
(1) light-emitting parts: module color screen display module typically yellow green, pure green module expensive;
SMD led full colour display general use pure green tube;
(2) display: module color screen pixel point Visual feel thicker, brightness is less likely to have mosaic phenomenon;
SMD led full colour display consistency better, higher brightness;
(3) maintenance: easy maintenance module, full color, block module replacement costs are high;
Patch all caiyi maintenance, you can replace the single lamp maintenance;
11. outdoor screen can table with LED, why?
Cannot. Outdoor screen installation structure requires strict, SMD LED cannot adapt to the harsh environment outdoors;
Outdoor screen brightness higher, SMD LED cannot meet the demands of outdoor screen brightness.
12. outdoor screen comparison of production cycles and why?
(1) raw material procurement: LED lamp purchase cycle is long, particularly imports of Wick, order cycle takes 4-6 weeks;
(2) the complex production process: subject to the PCB design, cover production, gluing, adjusting white balance, etc.;
(3) structure requires strict: typically box design, regardless of wind, rain, lightning, etc.
13. how to help users select the appropriate display?
(1) display content requirements;
(2) Visual distance, angle of confirmation;
(3) the screen resolution requirements;
(4) environmental requirements;
(5) the costs of control;
14. the display aspect ratio in General?
Graphic screen: display the contents;
Video screen: typically close to 4: 3 or 4: 3; the ideal ratio of 16: 9.
15. a control system to control the number of points?
Communication screen A card: monochrome, 64-color 1024 ×;
Communication screen B card: monochrome: 896 ×; 512-color: 896 ×; 256
DVI dual color screen: 1280 × 768;
DVI-color display: 1024 x 512;
16. the display of the installation requirements?
Power supply: power supply connection point within the screen body dimensions
220V power supply and FireWire cable Earth wire; 0
380V AC power supply, three FireWire a 0 line grounding;
FireWire and 0 line conductor cross-sectional area;
10 kW and above display should buck boot device.
Communication: communication distance is a communication line length is defined.
To the installation screen model with standard communication line length to install a communication line.
Communication lines prohibition and power cord in the same line tube alignment.
Installation requirements: display installed around the level, does not permit retroversion
Hoisting to retro adjustable rod
Wall installation, to put forward off the hook
Floor installation to add location support bolts.